Inside a grave in Mount Auburn Cemetery in Cambridge, Massachusetts, is DNA that could finally put to rest debate about whether Abraham Lincoln's killer escaped capture and lived for years before committing suicide.

What's that you say? Wasn't this all solved 145 years ago? That depends on who you ask.

The way it's written in history books, John Wilkes Booth was cornered 12 days after shooting President Lincoln at Ford's Theatre and killed in a tobacco barn before being laid to rest in a family plot. But there have been several historians over the years not entirely satisfied with this version....